code: def serialize(encoder):
      return utils.serialize_keras_object(encoder)
  
file_path: autokeras/autokeras/hyper_preprocessors.py
imports: from autokeras import preprocessors
  from autokeras.engine import hyper_preprocessor
  from autokeras.utils import utils
label_desc: Use image node_id 1 for calling a global function with example usage: serialize(encoder) and returns: utils